Aaron Young of the Crows is out marked by Cam Ellis-Yolmen of the Power during the 2013 NAB Cup round 01, week 01 match between the Adelaide Crows and Port Adelaide Power at AAMI Stadium, Adelaide. (Photo: James Elsby/AFL Media)

Jackson Trengove of Port tackled by Luke Thompson of the Crows during the 2013 NAB Cup round 01, week 01 match between the Adelaide Crows and Port Adelaide Power at AAMI Stadium, Adelaide. (Photo: AFL Media)

Aaron Young of Port during the 2013 NAB Cup round 01, week 01 match between the Adelaide Crows and Port Adelaide Power at AAMI Stadium, Adelaide. (Photo: AFL Media)

Ricky Henderson of the Crows clashes with Justin Westhoff of Port during the 2013 NAB Cup round 01, week 01 match between the Adelaide Crows and Port Adelaide Power at AAMI Stadium, Adelaide. (Photo: AFL Media)

Cam Ellis-Yolmen of the Crows tackled by Matt Thomas of Port during the 2013 NAB Cup round 01, week 01 match between the Adelaide Crows and Port Adelaide Power at AAMI Stadium, Adelaide. (Photo: AFL Media)